I've seen people have dental problems, and certainly complain of things like dry mouth which absolutely has a documented impact on risk for dental caries and other complications, but I've never actually seen a major dental complication clearly linked to Suboxone. I've also never seen TDP from Lexapro, but I still mention it to patients. I also believe there is an argument that the acidic nature of Suboxone, the frequency with which some people take it, and the duration of keeping it in your mouth long enough to dissolve is suspected to be the culprit. I certainly don't put it past the drug company to manipulate things, but I also don't think it means we just ignore something that could certainly be a (rare) effect.
I've seen people switch from Suboxone to Zubsolv to Subutex for any variety of reasons that mostly seem like individual preference, but I've never actually seen anyone switch to Sublocade because of anything other than 1) having trouble with stable/consistent SL adherence (both missing or taking extra), 2) the taste (seriously everyone hates it, this really can't be fixed?), 3) temporarily for travel, and 4) convenience or stigma. These are all very reasonable expectations and benefits of an LAI like Sublocade, so I would argue there is value in it.